Repairing faulty PCB on harman kardon Sb

Borut Poljsak

There is no sound from my Sb15 Soundbar. And I took out the small PCB to look for errors: Then I found a brown fluid on the board, on different places but most around the Capacitors. Some of them are bulbed on the top and broken I guess but the brown fluid are also around those who looks ok, flat top.

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Reply 2016-07-23 12:00:27

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Sinan Gunay

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I have seen that brown stuff become slightly conductive also use 105 deg caps.

Reply With Quote 2017-01-02 23:58:44

luigi.rodorigo

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Capacitors that have 'blown' under duress are always with poor quality. They will all require replacement.

Reply With Quote 2016-10-20 03:24:41

Barbara Seria

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Some of that 'Brown stuff' on the board is the glue used to prevent the caps from vibrating. However any caps need replacement even slightly bulged.

Reply With Quote 2016-10-18 23:56:56

kasemkwang

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It's also better to put same value caps from the next up voltage range. This generally reduces the heating of the caps, and reduces the chance of catastrophic release of the magic smoke.

Reply With Quote 2016-09-01 02:24:50